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    Home / Products / Transceivers / 25G/40G Transceivers / 40G QSFP+ / 100024

    Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

    Product No: 100024
    14 Reviews
    613 Sold
    US$ 125.00
    Compatible
    Transceivers type
    456 in real-time stock, 10 Jun, 2026

    Free Shipping over US$ 79.8

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    30-day Return and Refund

    5-Year Warranty 30-Day Returns 90-Day Exchange
    Warranty
    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
    Returns & Exchange
    Exchanges caused by the customer's reasons will not be accepted.
    Please ensure that the item you're returning is repackaged with all the cords, adapters, and documentation included when you receive it.
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    Add to Cart Bulk Order Quotes 
    1. < 3.5W Low Power Consumption.
2. Link Up to 20 km via Singlemode OS2.
2. LC Duplex Connector, DFP+PIN.
3. Fully Compatible with 100+ Vendors.
4. For Data Center and 40G Ethernet Applications.
5. Hot Pluggable QSFP+ MSA Compliant.
    See more

    Specifications

    Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 20km, LC, DDM)

     

    The Juniper QSFP-LR4-40G-20 compatible 40G QSFP+ LR4 transceiver module is equipped with LC duplex connectors, reaching a link up to 20km over OS2 single-mode fiber (SMF). This 40G optical transceiver comes with a bidirectional 4-channel QSFP+ connector, enabling a total of 40 Gbps bandwidth by each channel carrying a 10 Gbps data rate. DOM/DDM (digital diagnostics monitoring) function is supported on the QSFP 40G fiber optic transceiver to achieve real-time operating parameters monitoring.

     

    QSFPTEK manufactured 40GBASE-LR4 QSFP+ module is compliant with QSFP+ MSA and 40GBASE-LR4 specifications. Besides, the QSFP LR4 optic has been tested on host devices to ensure full compatibility with Juniper equipment, such as data center switches, enterprise routers, and server network interface cards (NICs). The third-party 40G SFP module is an ideal substitute to the QSFP-40GE-LR4 QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.

     

    LR4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in the data center, enterprise core and distribution layers, campus networks, metro networks, etc.

     

    Model Name QSFP-LR4-40G-20 Vendor Name QSFPTEK
    Form Factor QSFP+ Data Rate 40 Gbps
    Wavelength 1310nm Distance 20km@OS2
    Connector LC Duplex Cable Type OS2 SMF
    Transmitter Type DFB Receiver Type PIN
    TX Power -4~2.3dBm Receiver Sensitivity <-11.5dBm
    Power Consumption <3.5W Modulation Format NRZ
    DDM Support Bit Error Ratio (BER) 1E-12
    Protocols QSFP+ MSA, SFF-8436, 40G Ethernet Warranty 5 Years
    Quality Testing Program
    Optical Transceivers Testing

    Take a look at our test program to get the reliable and high-performance optical transceivers.

    Quality Certifications

    Features

    • 1. High Reliablility and Best Price
      Proudly self-producing and rigorous testing, QSFPTEK is dedicated to delivering cost-effective products with high reliability and performance at a trade price.
    • 2. Wide Application Scenarios
      Fully compatible with almost all Juniper devices. Ideal for data center, campus network, metro network, etc.
    • 3. Protocols
      Compliant with QSFP+ MSA, SFF-8436, 40G Ethernet.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: 40GBASE-LH4 Direct Connectivity

    40GBASE-LH4 Direct Connectivity

     

     

    Scenario 2: 40GBASE-LH4 Connectivity with NIC

    40GBASE-LH4 Connectivity with NIC

     

     

    Scenario 3: 40GBASE-LH4 Connectivity with Adapter Panel

    40GBASE-LH4 Connectivity with Adapter Panel

     

    Product details

    Various Switch Tests

     

    Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

     

    QT-QSFP-LH4 compatibility test

     

     

    Tested in The Host Device to Prove Interoperability

     

    Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

     

    QSFPTEK Test Rack

     

     

    Various Switch Tests

     

    Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.

     

    QSFPTEK Test Devices

     

     

    40G QSFP+ Model Contrast Table

     

    Part Number

    QT-QSFP+-SR4

    QT-QSFP+-IR4

    QT-QSFP+-PSM4

    QT-QSFP+-LR4

    QT-QSFP+-LR4-20

    QT-QSFP+-ER4

    QT-QSFP+-ZR4

    Image

    Wavelength

    850nm

    CWDM

    1310nm

    CWDM

    CWDM

    CWDM

    LWDM 1294~1310nm

    Max Distance

    150m

    2km

    10km

    10km

    20km

    40km

    80km

    Cable Type

    OM3/OM4 MMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    Connector

    MPO/MTP-12

    LC Duplex

    MPO/MTP-12

    LC Duplex

    LC Duplex

    LC Duplex

    LC Duplex

    Tx Power(dBm)

    -7 ~ 1

    -7 ~ 2.3

    -6 ~ -1

    -7 ~ 2.3

    -4 ~ 2.3

    -2.7 ~ 4.5

    -2.7 ~ 4.5

    Rx Sensitivity(dBm)

    -9.5

    -11.5

    -14.4

    -13.7

    -11.5

    -19

    -28

    Power Consumption

    <0.7W

    <2.5W

    <2.5W

    < 2.5W

    <3.5W

    <3.5W

    <5W

    Source

    VCSEL + PIN

    DFB + PIN

    4xDFB + PIN

    DFB + PIN

    DFB + PIN

    DFB + PIN

    4xDFB + APD

    Operating Temperature

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    0 to 70°C

    Questions & Answers

    • ALL (8)

    Customer Reviews

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    • ALL (8)
    • Customer Support (1)
    • Excellent Quality (1)
    • Good Price (1)
    • Technical Support (1)
    • Plug-and-Play (1)
    • Stable (2)
    • Compatibility (7)
    • Ismail Malaysia
      2026-02-06

      Installed this Juniper-compatible 40GBASE-LR4 QSFP+ from QSFPTEK into my Cisco Nexus 5548UP switch. Flawless performance over 15km of single-mode fiber. Great value and perfect compatibility. Will definitely buy from QSFPTEK again for my network upgrades.

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

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    • Truman Australia
      2025-12-15

      Purchased this compatible QSFP+ module for connecting two Juniper QFX5110 switches via LC duplex fiber. It was a plug-and-play installation, recognized immediately and running stably at full 40Gbps. Excellent value for the performance.

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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    • Tom08 United States of America
      2025-11-26

      The module worked perfectly on the Juniper EX4650-48Y-AFI switch, the indicator light turned green quickly, and it ran stably. Great value for the money! The only downside was that I initially chose the wrong model, and returning it and buying a new one was a bit of a hassle.

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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    • I L Italy
      2025-10-23

      Ottimo modulo QSFP+ della QSFPTEK! L'ho usato sul mio switch Juniper MX304 e funziona perfettamente, nessun problema sui 20km. Prezzo imbattibile, continuerò sicuramente a comprare da loro!

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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    • Jaydev R. United States of America
      2025-09-30

      Had some questions about fiber type selection when deploying a metropolitan area network, Talia and their technical support provided a very professional solution. Thay not only confirmed the module's compatibility with my MX960 router but also guided us in optimizing the optical path design. The module's performance was stable, and the service experience exceeded our expectations!

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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      0

    • Dax L. United States of America
      2025-09-26

      The modules themselves are excellent. Using them on a Juniper PTX10004, we experienced stable transmission over 20 km, with acceptable optical power specifications. The product quality is excellent, but we wish the shipping was a bit faster; the wait was a bit long because they are having a holiday soon.. However, considering the significant cost savings, it was well worth it.

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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    • Jackson Y United States of America
      2025-06-06

      Wored flawlessly on Juniper EX4400. Once plugged into the port, the module is immediately recognized by the device and linked up as expected.

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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    • Jrodsly Italy
      2025-04-29

      Needing 40G LR4 modules for our next project, we requested samples from QSFPTEK as first-time buyers. After testing on Juniper ACX7100-32C, all samples performed flawlessly with zero compatibility issues. Impressed by the performance and customer service, we confidently placed a bulk order for 100 units.

      Transceivers typeQSFP-LR4-40G-20

      CompatibleJuniper

      Verified Purchase

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    Resources

    • PDF Document
      QT-QSFP+-LH4 Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
    Check Test Reports on Target Device
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    Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

    Compatible Juniper

    Transceivers type QSFP-LR4-40G-20

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    Mark

    2023-12-15
    This product works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent value fo ct works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent valur money!

    Verified Purchase

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    Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module
    US$ 125.00
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    QSFP-LR4-40G-20
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    Bulk Order Quotes
    Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

    Compatible Juniper

    Transceivers type QSFP-LR4-40G-20

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